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Title: Evaluation of multi-decadal UCLA-CFSv2 simulation and impact of interactive atmospheric-ocean feedback on global and regional variability

Abstract

This paper evaluates multi-decadal simulations of the UCLA version of Climate Forecast System version 2 (CFSv2), in which the default Noah land surface model has been replaced with the Simplified Simple Biosphere Model version-2 (SSiB2). To examine the influence of the atmosphere-ocean (AO) interaction on the variability, two different simulations were conducted: one with interactive ocean component, and the other constrained by the prescribed sea surface temperature. We evaluate the mean seasonal climatology of precipitation and temperature, along with the model’s ability to reproduce atmospheric variability at different scales over the globe, including extratropical modes of atmospheric variability, and long-term trends of global and hemispheric temperature and regional precipitation. Here, we particularly selected two monsoon regions, East Asia and West Africa, where the simulation of multi-decadal variations which has heretofore been a challenging task, to examine decadal variation of monsoon precipitation. In general, temperature anomaly trends were better captured than those of precipitation in both simulations. Results suggest that the AO interaction, represented as latent heat flux, contributes to improve reproducibility of global-wide climatology, extratropical modes of atmospheric variability, and variability in the multi-decadal climate simulation, as well as for inter decadal variability of the East Asian summer monsoon.

Authors:
ORCiD logo [1];  [2];  [3];  [2];  [4];  [5];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California, Los Angeles, CA (United States)
  3. San Diego State Univ., San Diego, CA (United States)
  4. George Mason Univ., Fairfax, VA (United States)
  5. National Oceanic and Atmospheric Administration (NOAA), College Park, MD (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1463837
Report Number(s):
LLNL-JRNL-742177
Journal ID: ISSN 0930-7575; 896865
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Climate Dynamics
Additional Journal Information:
Journal Volume: 52; Journal Issue: 5-6; Journal ID: ISSN 0930-7575
Publisher:
Springer-Verlag
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Lee, Jiwoo, Xue, Yongkang, De Sales, Fernando, Diallo, Ismaila, Marx, Larry, Ek, Michael, Sperber, Kenneth R., and Gleckler, Peter J. Evaluation of multi-decadal UCLA-CFSv2 simulation and impact of interactive atmospheric-ocean feedback on global and regional variability. United States: N. p., 2018. Web. doi:10.1007/s00382-018-4351-8.
Lee, Jiwoo, Xue, Yongkang, De Sales, Fernando, Diallo, Ismaila, Marx, Larry, Ek, Michael, Sperber, Kenneth R., & Gleckler, Peter J. Evaluation of multi-decadal UCLA-CFSv2 simulation and impact of interactive atmospheric-ocean feedback on global and regional variability. United States. doi:10.1007/s00382-018-4351-8.
Lee, Jiwoo, Xue, Yongkang, De Sales, Fernando, Diallo, Ismaila, Marx, Larry, Ek, Michael, Sperber, Kenneth R., and Gleckler, Peter J. Fri . "Evaluation of multi-decadal UCLA-CFSv2 simulation and impact of interactive atmospheric-ocean feedback on global and regional variability". United States. doi:10.1007/s00382-018-4351-8. https://www.osti.gov/servlets/purl/1463837.
@article{osti_1463837,
title = {Evaluation of multi-decadal UCLA-CFSv2 simulation and impact of interactive atmospheric-ocean feedback on global and regional variability},
author = {Lee, Jiwoo and Xue, Yongkang and De Sales, Fernando and Diallo, Ismaila and Marx, Larry and Ek, Michael and Sperber, Kenneth R. and Gleckler, Peter J.},
abstractNote = {This paper evaluates multi-decadal simulations of the UCLA version of Climate Forecast System version 2 (CFSv2), in which the default Noah land surface model has been replaced with the Simplified Simple Biosphere Model version-2 (SSiB2). To examine the influence of the atmosphere-ocean (AO) interaction on the variability, two different simulations were conducted: one with interactive ocean component, and the other constrained by the prescribed sea surface temperature. We evaluate the mean seasonal climatology of precipitation and temperature, along with the model’s ability to reproduce atmospheric variability at different scales over the globe, including extratropical modes of atmospheric variability, and long-term trends of global and hemispheric temperature and regional precipitation. Here, we particularly selected two monsoon regions, East Asia and West Africa, where the simulation of multi-decadal variations which has heretofore been a challenging task, to examine decadal variation of monsoon precipitation. In general, temperature anomaly trends were better captured than those of precipitation in both simulations. Results suggest that the AO interaction, represented as latent heat flux, contributes to improve reproducibility of global-wide climatology, extratropical modes of atmospheric variability, and variability in the multi-decadal climate simulation, as well as for inter decadal variability of the East Asian summer monsoon.},
doi = {10.1007/s00382-018-4351-8},
journal = {Climate Dynamics},
number = 5-6,
volume = 52,
place = {United States},
year = {2018},
month = {7}
}

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